Cohen, Herb
You can negotiate anything = agar anda mendapatkansegala yang anda inginkan
Serambi Ilmu Semesta, 2011
 Buku Teks
Hubbard, Douglas W.
How to measure anything: finding the value of intangibles in business
Wiley, 2014
 Buku Teks
Hubbard, Douglas W.
How to measure anything : finding the value of intangibles in businesse
John Wiley & Sons, 2007
 Buku Teks
Hartley, Gregory
How to become an expert on anything in two hours
American Management Association, 2008
 eBooks
How to do just about anything : reader's digest
The Reader's Digest Association, 1988
 Buku Referensi